feat: vendor official hippo memory extension

tests/extension-load.test.ts

@@ -1,5 +1,5 @@
 import assert from "node:assert/strict";
-import { mkdtemp, readFile } from "node:fs/promises";
+import { chmod, mkdir, mkdtemp, readFile, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { dirname, join, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
@@ -11,9 +11,26 @@ const hasPi = spawnSync("pi", ["--version"], { encoding: "utf8" }).status === 0;
 
 test("all package extensions load together without global registration conflicts", { skip: !hasPi }, async () => {
 	const packageJson = JSON.parse(await readFile(join(repositoryRoot, "package.json"), "utf8")) as {
+		dependencies: Record<string, string>;
 		pi: { extensions: string[] };
 	};
+	assert.ok(
+		packageJson.pi.extensions.includes("./hippo-memory-pi/index.ts"),
+		"the bundle must load the vendored official Hippo Memory extension",
+	);
+	assert.equal(
+		packageJson.pi.extensions.some((entry) => entry.includes("pi-hermes-memory") || entry.includes("the-forge-flow")),
+		false,
+		"retired Hermes and third-party Hippo extensions must not be loaded",
+	);
+	assert.equal(packageJson.dependencies["@the-forge-flow/hippo-memory-pi"], undefined);
+	assert.equal(packageJson.dependencies["@sinclair/typebox"], undefined);
 	const home = await mkdtemp(join(tmpdir(), "my-pi-extension-load-"));
+	const mockBin = join(home, "bin");
+	await mkdir(mockBin, { recursive: true });
+	const hippo = join(mockBin, "hippo");
+	await writeFile(hippo, "#!/bin/sh\nprintf '%s\\n' 'Hippo Memory status'\n", "utf8");
+	await chmod(hippo, 0o755);
 	const args = ["--no-extensions"];
 	for (const entry of packageJson.pi.extensions) args.push("-e", resolve(repositoryRoot, entry));
 	args.push("--help");
@@ -27,6 +44,7 @@ test("all package extensions load together without global registration conflicts
 			XDG_CONFIG_HOME: join(home, ".config"),
 			PI_CODING_AGENT_DIR: join(home, ".pi-agent"),
 			MY_PI_SEARCH_CONFIG: join(home, "missing-search.env"),
+			PATH: `${mockBin}:${process.env.PATH ?? ""}`,
 			PI_OFFLINE: "1",
 			TAVILY_API_KEY: "",
 			EXA_API_KEY: "",